Goodwill and Other Intangible Assets - Summary of Changes in Goodwill by Reportable Business Segment (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 3,811,862
Acquisitions	(13,232)
Foreign Currency	(86,304)
Goodwill, Ending Balance	3,712,326
North America [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	2,659,417
Acquisitions	(10,995)
Goodwill, Ending Balance	2,648,422
International [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,152,445
Acquisitions	(2,237)
Foreign Currency	(86,304)
Goodwill, Ending Balance	$ 1,063,904